Home / 212,821.34-319,016.55-137,988.86

Finding the Fourth Proportional to 212,821.34, 319,016.55 and 137,988.86

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Solution

The fourth proportional to 212,821.34, 319,016.55 and 137,988.86 is: 206,843.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    212,821.34 : 319,016.55 = 137,988.86 : x
  2. Step 2: Convert to fraction form
    212,821.34/319,016.55 = 137,988.86/x
  3. Step 3: Cross multiply
    212,821.34x = 319,016.55 × 137,988.86
  4. Step 4: Simplify right side
    212,821.34x = 44,020,730,055.63
  5. Step 5: Solve for x
    x = 44,020,730,055.63/212,821.34
  6. Step 6: Final answer
    x = 206,843.59

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.